He thought nobody was around but he was in fact seen into the office building .A. to ste

问题补充：

He thought nobody was around , but he was in fact seen into the office building .

A. to steal

B. steal

C. stole

D. stolen

答案：

(答案→)A. to steal

B. steal

C. stole

D. stolen

解析：考查非谓语动词。句意：他认为周围没有人，但是实际上有人看到他进入大楼偷东西了。See后面接不带to的不定式，但是当变成被动语态时，后面要加上to，故选A。